本文選題：液壓叉車 + 液壓馬達�。� 參考：《蘭州理工大學》2011年碩士論文

【摘要】：本課題以25t/h鋁錠轉(zhuǎn)位全液壓叉車為研究對象,針對傳統(tǒng)輪胎式人操作叉車轉(zhuǎn)運過程存在的問題,在如何提高系統(tǒng)運行平穩(wěn)性、零部件使用壽命、控制精度以及生產(chǎn)效率等方面進行了全面的分析。本文立足于滿足轉(zhuǎn)運叉車的運行平穩(wěn)性,減少機器運行的故障,提高系統(tǒng)的響應速度和控制精度、便于維修,提高實際生產(chǎn)效率等要求。本文主要完成以下工作： 首先根據(jù)鋁錠轉(zhuǎn)運全液壓叉車的功能要求設計液壓系統(tǒng)。以鋁錠轉(zhuǎn)運全液壓叉車的工作狀況及負載特性為依據(jù),對整個系統(tǒng)進行運動學和動力學分析,根據(jù)實際工況的要求計算系統(tǒng)主要參數(shù),對系統(tǒng)元件進行合理地選擇。 然后以鋁錠連鑄生產(chǎn)線液壓叉車的叉車架體為研究對象,用三維軟件Pro/E建立三維模型,將三維模型導入ANSYS建立有限元模型,對叉車架體進行線性靜力分析和模態(tài)分析,分析叉車架體的變形及應力分布情況,找出變形及應力最大位置,提出叉車架體的改進方案,提高方案設計的可靠性。 并且根據(jù)所建立的液壓系統(tǒng)數(shù)學模型推導出系統(tǒng)的傳遞函數(shù),并利用基于MATLAB的動態(tài)模型與系統(tǒng)仿真工具-SIMULINK對控制系統(tǒng)進行了動態(tài)特性分析和仿真實驗。在對系統(tǒng)進行仿真過程中,充分考慮到系統(tǒng)在實際工作時的各種情況,設定仿真參數(shù),進行仿真分析。 最后對鋁錠轉(zhuǎn)運全液壓叉車位置控制系統(tǒng)進行PLC方案設計,分別從系統(tǒng)主控制器的選擇及鋁錠轉(zhuǎn)運叉車的定位控制方案兩個方面進行設計。 在本文中所提到的一些研究方法和結(jié)論將對今后鋁錠轉(zhuǎn)運全液壓叉車產(chǎn)品的研制和開發(fā)提供理論參考。
[Abstract]:This subject takes 25t/h aluminum ingot transposition full hydraulic forklift as the research object, aiming at the problems existing in the transfer process of the traditional tire type man-operated forklift truck, how to improve the running stability of the system, and how to improve the service life of the parts and components. The control precision and production efficiency are analyzed comprehensively. This paper is based on the requirements of satisfying the smooth running of the forklift truck, reducing the faults of the machine running, improving the response speed and control precision of the system, facilitating the maintenance and improving the actual production efficiency. The main work of this paper is as follows: Firstly, the hydraulic system is designed according to the function requirement of aluminum ingot transfer full hydraulic forklift. Based on the working conditions and load characteristics of the fully hydraulic forklift truck for aluminum ingot transportation, the kinematics and dynamics of the whole system are analyzed, and the main parameters of the system are calculated according to the actual working conditions, and the system components are reasonably selected. Then taking the forklift frame of hydraulic forklift in aluminum ingot continuous casting production line as the research object, the three-dimensional model is established by using three-dimensional software Pro/E, and the three-dimensional model is introduced into ANSYS to establish the finite element model, and the linear static analysis and modal analysis of the forklift frame are carried out. This paper analyzes the deformation and stress distribution of forklift frame body, finds out the maximum position of deformation and stress, and puts forward an improved scheme for forklift frame body to improve the reliability of the scheme design. According to the established mathematical model of hydraulic system, the transfer function of the system is derived, and the dynamic characteristic analysis and simulation experiment of the control system are carried out by using the dynamic model based on MATLAB and the simulation tool of the system. In the simulation process of the system, the simulation parameters are set and the simulation analysis is carried out taking into account the various situations of the system in practice. Finally, the position control system of fully hydraulic forklift for aluminum ingot transfer is designed by PLC scheme, including the selection of the main controller of the system and the positioning control scheme of the forklift truck. Some research methods and conclusions mentioned in this paper will provide a theoretical reference for the research and development of fully hydraulic forklift truck products for aluminum ingot transfer in the future.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH242

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